/*
 * Copyright (c) 2009 Tamás Kovács <keccs *at* inbox.com>
 * 
 * Permission is hereby granted, free of charge, to any person
 * obtaining a copy of this software and associated documentation
 * files (the "Software"), to deal in the Software without
 * restriction, including without limitation the rights to use,
 * copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following
 * conditions:
 * 
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 * 
 */
package keccs.hitTheHay.core;

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import keccs.hitTheHay.ui.ExitAction;

class TimeLeftUpdateListener implements ActionListener {
	private long lastTick;
	private boolean paused = false;

	public TimeLeftUpdateListener() {
		int countdownTimeInMinutes = ApplicationModel.getInstance().getTime();
		// A 10 minute countdown starts from 10:00.999 and ends if timeLeft <=
		// 00:01.000, just to make the time display look better
		ApplicationModel.getInstance().setTimeLeft(countdownTimeInMinutes * 60 * 1000 + 999);
		lastTick = System.currentTimeMillis();
	}

	@Override
	public void actionPerformed(ActionEvent e) {
		long now = System.currentTimeMillis();
		if (!paused) {
			ApplicationModel applicationModel = ApplicationModel.getInstance();
			long timeLeft = applicationModel.getTimeLeft();
			applicationModel.setTimeLeft(timeLeft - (now - lastTick));
		}
		lastTick = now;
		invokePowerChangeIfCountdownEnded();
	}

	private void invokePowerChangeIfCountdownEnded() {
		ApplicationModel app = ApplicationModel.getInstance();
		if (app.getTimeLeft() < -1000) {
			// assume the computer was in suspend state and exit
			new ExitAction().actionPerformed(null);
		} else if (app.getTimeLeft() <= 1000) {
			app.stopCountdown();
			app.getAction().performPowerStateChange();
			new ExitAction().actionPerformed(null);
		}
	}
}